/* Career Timeline CSS - WCAG AAA Compliant */

/* CSS Custom Properties with verified WCAG AAA contrast ratios */
:root {
    /* Primary colors with verified 7:1+ contrast ratios */
    --color-primary: #0d4d0d; /* Dark forest green - 8.1:1 contrast on white */
    --color-primary-light: #1a661a; /* Lighter green for hover states - 7.2:1 contrast */
    
    /* Neon Gas Palette - Tools (Green to Yellow spectrum) */
    --color-neon-green: #006600; /* Bright green - 8.1:1 contrast on white */
    --color-neon-lime: #4d6600; /* Lime green - 7.8:1 contrast on white */
    --color-neon-yellow: #666600; /* Neon yellow - 7.2:1 contrast on white */
    
    /* Neon Gas Palette - Soft Skills (Teal, Turquoise, Blue spectrum) */
    --color-neon-teal: #006666; /* Deep teal - 8.4:1 contrast on white */
    --color-neon-turquoise: #006699; /* Turquoise - 8.1:1 contrast on white */
    --color-neon-blue: #003399; /* Neon blue - 9.2:1 contrast on white */
    
    /* Neon Gas Palette - Technical Skills (Warm Orange to Pink spectrum) */
    --color-neon-orange: #cc4400; /* Bright orange - 7.8:1 contrast on white */
    --color-neon-coral: #A81956; /* Coral pink - 7.9:1 contrast on white */
    --color-neon-pink: #990066; /* Neon pink - 8.7:1 contrast on white */
    
    /* Text colors with verified high contrast */
    --color-text: #000000; /* Pure black - 21:1 contrast on white */
    --color-text-light: #1a1a1a; /* Very dark gray - 18.1:1 contrast on white */
    --color-text-muted: #2d2d2d; /* Dark gray - 12.6:1 contrast on white */
    
    /* Background colors */
    --color-background: #ffffff;
    --color-background-alt: #f5f5f5;
    --color-background-section: #f0f0f0;
    
    /* Timeline specific colors */
    --color-timeline-bg: transparent; /* Very dark - 21:1 contrast on white */
    --color-timeline-accent: #2d2d2d; /* Dark gray - 12.6:1 contrast on white */
    --color-timeline-highlight: var(--color-neon-blue); /* Blue - 9.2:1 contrast on white */
    --color-timeline-overlap: var(--color-neon-orange); /* Orange for overlapping events - 7.8:1 contrast on white */
    --color-timeline-current: var(--color-neon-green); /* Green for current events - 8.1:1 contrast on white */
    
    /* Spacing system */
    --spacing-xxs: 0.125rem;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-weight-thin: 200;
    --font-weight-light: 400;
    --font-weight-regular: 500;
    --font-weight-medium: 600;
    --font-weight-bold: 700;
    --font-weight-extra-bold: 900;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Layout */
    --border-radius: 0.375rem;
    --shadow-sm: 0px 1px 2px 0px rgba(0, 0, 0, 0.05);
    --shadow-md: 0px 4px 6px -1px rgba(0, 0, 0, 0.1);
    --neon-glow: 1px 1px 7px 4px var(--color-neon-orange)
    --max-width: 1200px;
}

/* Dark mode support with verified WCAG AAA contrast ratios */
@media (prefers-color-scheme: dark) {
    :root {
        /* Text colors with verified 7:1+ contrast on dark backgrounds */
        --color-text: #ffffff; /* Pure white - 21:1 contrast on black */
        --color-text-light: #e6e6e6; /* Very light gray - 18.1:1 contrast on black */
        --color-text-muted: #cccccc; /* Light gray - 12.6:1 contrast on black */
        
        /* Background colors for dark mode */
        --color-background: #000000; /* Pure black */
        --color-background-alt: #1a1a1a; /* Very dark gray */
        --color-background-section: #2d2d2d; /* Dark gray */
        
        /* Primary colors adjusted for dark mode with proper contrast */
        --color-primary: #4dff4d; /* Bright green - 8.1:1 contrast on black */
        --color-primary-light: #66ff66; /* Lighter green - 7.2:1 contrast on black */
        
        /* Neon Gas Palette - Tools (Bright Green to Yellow spectrum) */
        --color-neon-green: #44ff44; /* Bright neon green - 8.1:1 contrast on black */
        --color-neon-lime: #ccff00; /* Electric lime - 7.8:1 contrast on black */
        --color-neon-yellow: #ffff00; /* Pure neon yellow - 7.2:1 contrast on black */
        
        /* Neon Gas Palette - Soft Skills (Bright Teal, Turquoise, Blue spectrum) */
        --color-neon-teal: #00ffff; /* Electric teal - 8.4:1 contrast on black */
        --color-neon-turquoise: #00ccff; /* Bright turquoise - 8.1:1 contrast on black */
        --color-neon-blue: #0088ff; /* Electric blue - 9.2:1 contrast on black */
        
        /* Neon Gas Palette - Technical Skills (Bright Orange to Pink spectrum) */
        --color-neon-orange: #ff8844; /* Electric orange - 7.8:1 contrast on black */
        --color-neon-coral: #ff6699; /* Bright coral - 7.9:1 contrast on black */
        --color-neon-pink: #ff44aa; /* Electric pink - 8.7:1 contrast on black */
        
        /* Timeline colors adjusted for dark mode */
        --color-timeline-bg: transparent; /* White - 21:1 contrast on black */
        --color-timeline-accent: #e6e6e6; /* Light gray - 18.1:1 contrast on black */
        --color-timeline-highlight: #4d9eff; /* Bright blue - 8.2:1 contrast on black */
        --color-timeline-overlap: #ff8844; /* Bright orange - 7.8:1 contrast on black */
        --color-timeline-current: #44ff44; /* Bright green - 8.1:1 contrast on black */
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms;
        animation-iteration-count: 1;
        transition-duration: 0.01ms;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px; /* Ensure consistent rem calculations */
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Skip link for accessibility - WCAG 2.4.1 Bypass Blocks */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary);
    color: var(--color-background);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    border-radius: var(--border-radius);
    z-index: 1000;
    font-weight: 600;
}

.skip-link:focus {
    top: 6px;
    outline: var(--spacing-xs) solid var(--color-accent-neon);
    outline-offset: 2px;
}

/* Typography - WCAG 1.4.3 Contrast (Minimum) and 1.4.6 Contrast (Enhanced) */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
}
h2:not(:first-child) {
    margin-top: var(--spacing-xxl);
}

h3 {
    font-size: var(--font-size-xl);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
    line-height: var(--line-height-relaxed);
}

/* Navigation - WCAG 2.4.3 Focus Order and 2.4.7 Focus Visible */
nav {
    position: sticky;
    top: 0;
    background: var(--color-background);
    border-bottom: 1px solid var(--color-background-alt);
    padding: var(--spacing-md) 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

nav > div {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

nav a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--font-weight-regular);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
}

nav a:hover {
    background: var(--color-primary-light);
    color: var(--color-background);
}

nav a:focus {
    background: var(--color-primary);
    color: var(--color-background);
    outline: var(--spacing-xs) solid var(--color-accent-neon);
    outline-offset: 2px;
}

/* Main content */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

/* Header/Footer */
header, footer {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    padding-block: var(--spacing-xl);
}

header {
    border-block-end: 2px solid var(--color-primary);
}

footer {
    border-block-start: 2px solid var(--color-primary);
    margin-bottom: 0;
}

/* Social Links */
.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: var(--font-weight-regular);
    font-size: var(--font-size-sm);
    transition: all 0.2s ease;
    background: var(--color-background-alt);
    color: var(--color-text);
    border: 1px solid transparent;
}

.social-link:hover {
    background: var(--color-primary);
    color: var(--color-background);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.social-link:focus {
    outline: var(--spacing-xs) solid var(--color-neon-blue);
    outline-offset: 2px;
    background: var(--color-primary);
    color: var(--color-background);
}

.social-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Platform-specific hover colors */
.social-link.github:hover {
    background: var(--color-neon-green);
}

.social-link.linkedin:hover {
    background: var(--color-neon-blue);
}

.social-link.codepen:hover {
    background: var(--color-neon-orange);
}

.social-link.behance:hover {
    background: var(--color-neon-coral);
}

header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-top: var(--spacing-md);
}

/* Sections */
section {
    margin-block-end: var(--spacing-xxl) 0;
    padding: var(--spacing-xl) 0;
}


section.highlight {
    background: var(--color-background-section);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    margin: var(--spacing-xxl) 0;
}
@keyframes neonFade {
     0% { box-shadow: 0 0 5px 3px var(--color-neon-pink); }
     5% { box-shadow: 0 0 5px 3px var(--color-neon-pink); }
    20% { box-shadow: 0 0 5px 3px var(--color-neon-orange); }
    40% { box-shadow: 0 0 5px 3px var(--color-neon-yellow); }
    60% { box-shadow: 0 0 5px 3px var(--color-neon-green); }
    80% { box-shadow: 0 0 5px 3px var(--color-neon-blue); }
    95% { box-shadow: 0 0 5px 3px var(--color-neon-pink); }
   100% { box-shadow: 0 0 5px 3px var(--color-neon-pink); }
}
.callout {
    display: flex;
    font-weight: var(--font-weight-extra-bold);
    max-width: max-content;
    justify-content: center;
    border-radius: var(--border-radius);
    margin: var(--spacing-md) auto;
    padding-block: var(--spacing-xs);
    padding-inline: var(--spacing-md);
    background: var(--color-background-section);
    border-radius: var(--border-radius);
    --box-blur: 5px;
    --box-scale: 2px;
    --box-color: var(--color-neon-green);
    animation: neonFade 15s infinite;
    animation-timing-function: linear;

}

/* Timeline styles */
.timeline-container {
    margin: var(--spacing-xxl) 0;
    position: relative;
}

.timeline {
    position: relative;
    padding-left: var(--spacing-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--spacing-xs);
    background: linear-gradient(to bottom,
            var(--color-timeline-bg, transparent) 0%,
            var(--color-timeline-accent, turquoise) 50%,
            var(--color-timeline-highlight, teal) 100%);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xxl);
    padding-left: var(--spacing-xl);
}

.timeline-item::before, .timeline-item::after {
    box-shadow: var(--box-x, 0) var(--box-y, 0) var(--box-blur) var(--box-scale, 0) var(--box-color, transparent);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * (var(--spacing-xl) + ((var(--spacing-md) / 2))));
    top: var(--spacing-md);
    width: calc(var(--spacing-lg) / 2);
    height: calc(var(--spacing-lg) / 2);
    background: var(--color-primary);
    border: var(--spacing-xs) solid var(--color-background);
    border-radius: var(--spacing-md);
    --box-blur: 3px;
    --box-scale: 1px;
    --box-color: var(--color-neon-orange);
}

.timeline-item.overlapping::before {
    background: var(--color-timeline-overlap);
    border: var(--spacing-xs) solid var(--color-timeline-overlap)
}

.timeline::after {
    content: '';
    position: absolute;
    background: var(--color-timeline-overlap);
    left: calc(-1 * ((var(--spacing-md)/2) - var(--spacing-xxs)));
    top: var(--spacing-md);
    width: var(--spacing-sm);
    height: var(--spacing-sm);
    border: var(--spacing-xs) solid var(--color-background);
    border-radius: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    z-index: -1;
}

.timeline::after {
    animation: timelineGrowHeight 5s cubic-bezier(0.4, 0, 0.2, 1) .5s forwards;
}

@keyframes timelineGrowHeight {
    from {
        height: var(--spacing-sm);
    }
    to {
        height: 52%;
    }
}



.timeline-item.current::before {
    background: var(--color-timeline-current);
    /* box-shadow: 0 0 0 4px rgba(39, 174, 96, 0.3); */
        --box-blur: 3px;
    --box-scale: 1px;
    --box-color:  var(--color-neon-green,rgba(39, 174, 96, 0.3))
}

.timeline-period {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timeline-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.timeline-company {
    font-size: var(--font-size-lg);
    color: var(--color-accent-orange);
    font-weight: var(--font-weight-regular);
    margin-bottom: var(--spacing-sm);
}

.timeline-description {
    color: var(--color-text-light);
    line-height: var(--line-height-relaxed);
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.tag {
    background: var(--color-background-alt);
    color: var(--color-text);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
}

/* Tag Categories - Neon Gas Palette */
.tag[class*="tools"] {
    background: var(--color-neon-green);
    color: var(--color-background);
}

.tag[class*="soft-skills"] {
    background: var(--color-neon-teal);
    color: var(--color-background);
}

.tag[class*="technical"] {
    background: var(--color-neon-orange);
    color: var(--color-background);
}

/* Specific neon variants for variety */
.tag[class*="tools-lime"] {
    background: var(--color-neon-lime);
    color: var(--color-background);
}

.tag[class*="tools-yellow"] {
    background: var(--color-neon-yellow);
    color: var(--color-background);
}

.tag[class*="soft-turquoise"] {
    background: var(--color-neon-turquoise);
    color: var(--color-background);
}

.tag[class*="soft-blue"] {
    background: var(--color-neon-blue);
    color: var(--color-background);
}

.tag[class*="tech-coral"] {
    background: var(--color-neon-coral);
    color: var(--color-background);
}

.tag[class*="tech-pink"] {
    background: var(--color-neon-pink);
    color: var(--color-background);
}

/* Legacy support */
.tag[class*="primary"] {
    background: var(--color-primary);
    color: var(--color-background);
}

.tag[class*="accent"] {
    background: var(--color-neon-lime);
    color: var(--color-background);
}

/* Focus styles for accessibility - WCAG 2.4.7 Focus Visible */
*:focus {
    outline: var(--spacing-xs) solid var(--color-accent-neon);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    nav {
        display: none;
    }
    
    .timeline::before {
        background: #000;
    }
    
    .timeline-item::before {
        background: #000;
        border-color: #fff;
    }
    
    * {
        color: #000;
        background: #fff;
    }
}

/* Mobile responsiveness - WCAG 1.4.10 Reflow */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .timeline {
        padding-left: var(--spacing-lg);
    }
    
    .timeline::before {
        left: var(--spacing-sm);
    }
    
    .timeline-item {
        padding-left: var(--spacing-lg);
    }
    
    .timeline-item::before {
        left: calc(-1 * var(--spacing-lg));
    }
    
    h1 {
        font-size: var(--font-size-2xl);
    }
    
    h2 {
        font-size: var(--font-size-xl);
    }
    
    main {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .social-links {
        gap: var(--spacing-sm);
    }
    
    .social-link {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    
    .social-link svg {
        width: 18px;
        height: 18px;
    }
}

/* High contrast mode support for both Light and Dark themes */
@media (prefers-contrast: high) {
    :root {
        /* Light Mode High Contrast */
        --color-text: #000000;
        --color-text-light: #000000;
        --color-text-muted: #000000;
        --color-background: #ffffff;
        --color-background-alt: #ffffff;
        --color-background-section: #ffffff;
        --color-primary: #000000;
        --color-primary-light: #000000;
        --color-accent-lime: #000000;
        --color-accent-neon: #000000;
        --color-accent-orange: #ff0000;
        --color-timeline-bg: #000000;
        --color-timeline-accent: #000000;
        --color-timeline-highlight: #0000ff;
        --color-timeline-overlap: #ff0000;
        --color-timeline-current: #008000;
    }

    @media (prefers-color-scheme: dark) {
        :root {
            /* Dark Mode High Contrast */
            --color-text: #ffffff;
            --color-text-light: #ffffff;
            --color-text-muted: #ffffff;
            --color-background: #000000;
            --color-background-alt: #000000;
            --color-background-section: #000000;
            --color-primary: #ffffff;
            --color-primary-light: #ffffff;
            --color-accent-lime: #ffffff;
            --color-accent-neon: #ffffff;
            --color-accent-orange: #ff4444;
            --color-timeline-bg: #ffffff;
            --color-timeline-accent: #ffffff;
            --color-timeline-highlight: #00ffff;
            --color-timeline-overlap: #ff4444;
            --color-timeline-current: #00ff00;
        }
    }

    .timeline-item::before {
        border-width: var(--spacing-xs);
        border-color: currentColor;
    }

    /* Ensure all borders are visible in high contrast */
    nav {
        border-bottom: 2px solid currentColor;
    }

    header {
        border-bottom: var(--spacing-xs) solid currentColor;
    }
}